Soot blower



Aprii a, 1929. R, JR 1,709,167

SOOT BLOWE H Filed Feb. 26, 1.9127

4 Sheets-Sheet l Patented Apr. 16, 1929. 1,709,167 UNITED STATES PATENT.OFFICE.

THOMAS FRANCIS DWYER, JR., Oi! CAMBRIDGE, MKSSA CHU SETTS, 'ASSIGNOR TOSUPERIOR ENGINEERING COMPANY, OF BOSTON, MASSACHUSETTS.

soo'r BLOWER.

- Application filed February 26, 1927. Serial No. 171,250.

This invention relates to improvements in- Fig. 6 is a sectional viewthrough the soot-blowers for locomotives in which a noz Valvecon'trolling)the connections between the zle apparatus is employed tosweep a steam motors and the oiler, the view being somejet across theflue-sheet and terminals of what diagrammatic;

the flue tubes to dislodge soot accumulations F 1g. 1s a dlagrammaticview showin the 60 therefrom. In previous blowers that are inConnections between the two blowers an the actual use, so far as I amaware, the mechleads from the boiler, parts of the water-legs anism formoving the nozzle into and from belng shown in section. the fire-box andfor turning the nozzle to Fig. 8 is an enlarged detail view, showingsweep the jet is actuated by hand. the connection between one of themotors 65 ([he principal object of the instant invenandthe steam supply.

tion is to provide power-driven mechanism, Figs. 9, l0 and 11 are detailviews, re-- controlled from the cab, for both moving spectively,showlngsectional and plan views the nozzle into and from the fire-boxand of the body part of the main controlling turning the nozzle to sweepthe jet across the valve. Y

' flue-sheet. In a previous application filed In the pract1ce of themventlon two of by me September 27, 1926, Serial No. the blowers areemployed, one being mounted 138,080, is disclosed a soot-blower providedon each s1de ofthe fire-box so that the nozwith a power-driven motor forturning the. Z16 can be P J P the fire-box and 1 2 nozzle, butin thatdevice the nozzle remains turned so that the et sweeps somewhat more 75permanently in the fire-box. than one-half the area of the flue-sheetand In the instant invention, in addition to the terminals of flue.tubes so that the operaa power-driven motor vtor turning the noztion ofboth blowers will cover the entire zle to effect the sweeping of thejet, a second Surface. As both blowers are alike, a depower-driven motoris employed for projectscrlptionof one will suflice for both. 80 ing thenozzle into and withdrawing it from R eferr1ng to the drawings indetail, 10 the fire-box. Both of these motors are designates a portionof one of the waterdriven by steam from the boiler and their legs of alocomotive boiler, in the walls of connections With the same arecontrolled by which is seated the stay-tube 11 extending a common valvemechanism mounted in the transversely of the same. Abut-ting the as cab.Als0,a soot-blower is mounted on each outer Wall of the Water-leg,adjacent the side of the locomotive and the connections stay-tube, isthe inner end of-the casing 12 of theirrespective motors with the boilerin which is mounted the nozzle mechanism. are also controlled by thesame valve mech- The casing has a ni ple 13 on its inner. end

anism that controls the connections of the fitting the outer en of thestay-tube. Ex- 9 individualmotors, so that by the manipulatendinglongitudinally through the casing tion of a single valve mechanismeither one is a bearing 14 concentric with the nipple of the blowers canbe selected for operation and the stay-tube, the diameter of the bearandthis same valve mechanism can be actuing being considerably less thanthat of the 4o ated to control the operation of both the stay-tube.Vertically extending into the 95 motors of the selected blower. casingand across the base of the bearing In the drawings which illustrate anem- 14 is the passage 15, connected at its upper bodiment of theinvention, and in which simend by the steam-supply pipe 16 with the ilarreference characters designate corresconnection box 17, to which leadthe pipes ponding parts: 18 from a suitable dry steam space in the 1Figure lis a longitudinal sectional view boiler (not shown). .Bothsteam-supply of one of the soot-blowers, showing the same pipes 16 arecontrolled by the valvel6, the

mounted on a water-leg of a locomotive actuating rod 17 of which extendsinto the boiler with the nozzle housed in a stay-tube cab (not shown).

seated in the opposite walls of the water-leg. J ournaled in the bearing14 is the nozzle- 105 Fig. 2 is an end View. pipe 19, slidablelengthwise therein with its Figs. 3 and 4 are cross-sections on the lineinner end extending into the stay-tube l1 3-3 and 4:4,respectively, ofFig. 1. and having the nozzle 20 fixed .thereon. In Fig. 5 is adetaiUhorizontal section on the the side and end of the nozzle is theelonline 5'5 of Fig. 1. gated flared orifice 21 adapted to emit a fan-:10

like jet. In an. intermediate part of the nozzle-pipe are the ports 22to register with the passage when the pipe is moved lonitudinally toproject the nozzle into the re-box, the ports being closed by thethickened wall of the casing, as at 22, when the pipe is moved towithdraw the nozzle as shown in. Fig. 1. I

The motor for reciprocating the nozzle to project it from the stay-tubeinto the firebox and to retract it comprises the cylinder 23 with itswall integral with the body of the casing 12 and its bore concentricwith the bearing 14 in which is mounted the nozzlepipe 19 extending intothe cylinder. In 00- operative relation with .the cylinder is the piston24 fixed on the end of the nozzle-pipe within the cylinder.Communicating with opposite ends of the cylinder are the pipes 25 and26, respectively so that steam admitted into the cylinder-by the formerdrives the piston to roject the nozzle into the firebox; steam a mittedinto the cylinder by the pipe 26 drives the piston in the oppositedirection to retract the nozzle from the firebox.

The motor' for .oscillating the nozzle to swee the steam jet across theflue-sheet of the re-box comprises the vertical cylinder 27 mounted onthe horizontal cylinder 23 and the hollow piston 28 in the verticalcylinder. On the inner face of the cylinder. 27,

at its upper end, is the annular abutment 29, and on the periphery ofthe hollow pis-' ton 28 is the annular shoulder 30 in spaced relation tothe annular abutment 29. Be-

tween the abutment and shoulder and walls of the cylinder and piston isformed an annular steam chamber. A ort 31 leads through the wall of thecylin er, just below the abutment 29, into the annular steam chamber.Communicating with the outer end of the port. 31 is the steam pipe 32leading from a supply source. In the wall of the hollow piston 28 at itsupper end is a port 33 extending into the interior of the .piston.

' Thisport- 33 is so positioned that as the piston approaches the limitof its downward I stroke the port -.-registers with the annular chamberbetween the abutment 29 andthe shoulder 30, and as the piston approachesthe limit of its upward .movement the port passes-clear of theflupperedge of the cylin-' der and opens the interior of the piston to theexterior air.v

In the operation of this motor, with the cylinderand'piston in therelative positions shown in Fig. 1, steam is admitted from the pipe 32through the port 31 into the annular chamber between the abutment 29 andthe shoulder 30. The pressure of the steam between the fixed abutmentand the shoulder of the piston forces the piston downward until the ort33 registers with the'annular chamber slow the abutment. .When thisoccurs, steam flows through the port into the interior of the hollowpiston. As the area of the interior up er end of the piston is muchgreater than t e area of the shoulder 30, the downward movement of thepiston is checked and the greater pressure inside of the piston movesthe piston upward until the port 33 passes clear of the cylinder and thesteam within the piston escapes. As the pressure on the shoulder 30remains constant; as soon as the'pressure within the piston is relieved,the pressure on the shoulder prevailsand the piston is forced downward.In this way a quick reciprocative movement is imparted to the piston andof a very short stroke. This restricted reciprocative movement of thepiston is utilized to actuate'mechanism to impart an oscilla-' torymovement to the nozzle, previously projected into the fire-box.

. Fixed to the top of the hollow piston 28 are the brackets 34 to whichis fixed the plate 35 carrying at one end the pivoted pawl 36 in aposition to engage the teeth of the ratchet wheel 37. Whenthe pawldescends it is engaged by the cam 38 and moved "into engagement with oneof the'teeth of-the ratchet wheel. The ratchet wheel is fast on theshaft 39 journaled in the ends of the U-shaped frame 40 secured betweenthe o posite sides of the casing 12. --Fast on tl ie shaft 39 is thecylindrical block or barrel 41 7 having a circumferential cam-groove 42,

with which engages a finger 43 on the hub 44 having a sliding fit on thesquare rod 45. The rod extends-through the outer head of the cylinder 23and is secured to the closed end of the nozzle-pipe 19 in axialalinement therewith. The hub of the finger is held. be

tween the head of the cylinder 23 and the lug 46 (Fig. 2) to preventmovement of the finger longitudinally of the casing 12. The

engagement of the hub between the members 23 and 46 permits oscillationof the finger transverselyof the casing. I

When steam is admitted to the'motor formed primarily by the cylinder 27and piston 28, reciprocatory movement is im- 1 moved. by the motor 23-24to project the nozzle into thefire-"box, the nozzle will be oscillatedto sweep the steam jet across the flue-sheet and the terminals of fluetubes leading therefrom. The sliding connection between the finger andthe square rod permits the longitudinal movement of the nozzle-pipewithout interfering with the transmission of the oscillatory movement ofthe finger to the nozzle.

The steam-supply pipes for both motors are controlled by a commondiverting valve 50, (Figs. 6 and 7 This valve is preferably 'mounted inthe firemans side of the cab so that 'he can attend to the soot-cleaningop eration. This valve comprises a cylindrical casing 51 into which leadthe pipes 52 from the connection box 17. Communicating with the interiorof the casing 51 at each side thereof are the pipes 25 and 26 leading tothe respective motor 23-24 and the pipe 32 leading to the correspondingmotor 2728; the pipes 25 and 32 are branches of the respective singleconnection 25' with the valve casing. Journalled in the casing 51 is thevalve body 53-provided with a handle 54 (Fig. 7). A spring 55. engagingthe handle normally holds the valve body in a neutral position, as shownin Fig. 7. The

. i piston moves to the right of steam entering the cylinder through.the

, pipe 25 enters, the outer 23 and moves the piston with the exhaustbody of the valve is cut away to provide apassage 56 and an abutment 57.With the .valve body in a neutral position all the ports of the casingare closed, except those of the pipes 52 leading from the steam suppl enit is desired to operate one o the blowers, the one to the right for aninstance, the valve 53 is turned clock-wise until the port to the pipe25 is opened to the passage 56. With the valve so turned, communicationis established through the passage between the right-hand supply pipe 52and the pipe 25 and the abutment 57 closes communication between saidpassages and the port to the pipe 26. Steam then passes through thepipe. 25 and the branches 25 and 32. When the abutment 57 closes thepassage 56 to the pipe 26, communication is opened 'between said pipeand the port 61 in the abutment. -.From this port leads the passage-62to the exhaust chamber 63 communicating pipe 64. Consequently, anyresidue steam in the cylinder 23 on the right-hand'side ofthe piston, asshown in F1g. l, can exhaust to the outside as the under the influencepipe .25. ,The steam passing through theend ofthe cylinder 24 to 'theright, as shown in Fig. 1, and projects the nozzle 20 from the stay-tube11 into the fire-box. This movement of the nozzle also includes themovement of the nozzle-pipe 19 so that the opened, steam passes throughthe passage 15, the ports 22, the nozzle-pipe in a fan-like) ports 22thereof register with the passage 15 of the casing. The valve 16' havinbeen and the nozzle and is emitted jet from the orifice of the nozzletoward the flue-sheet of the fire-box.

Steam passin 32 enters throng the port 31 into the chamsaid pipe port toregister with the passage when the 110 casing when the the pipe 16.

through the branch pipe f ber between the abutment 29 and the shoulder30 of cylinder-piston motor 27-28 and this motor is operated aspreviously described. Throug the intervening mechanism the nozzle isoscillated to sweep the jet up and down the flue-sheet and into theterminals of the flue tubes. When the cleaning operation is completed,the valve is turned counter clock-wise to close the port to the pipe 25and to open the port to the pipe 26 so that steam is supplied to theinner end of the cylinder 23 to move the piston to the left, as shown inFig. 1, to withdraw the nozzle from the fire-box into the stay-tube.

lVhen the valveis turned to connect the passage 56 with the pipe 26,exhaust communication. is established between the ipe 25' and theexhaust haust pipe 64, so that the residual pressure medium to the leftof the piston, as shown in Fi 1, can exhaust through the pipes 25, 25',tl i e chamber- 63 and the exhaust pipe 64.

It is to be noted that the valve 16 is not essential to control thepipes 16, for under normal conditions the nozzle-pipes 19 of both,blowers are withdrawn from the firebox so that their ports 22 do notregister with the passages 15, consequently the pipes remain closed whenthe blowers are not in operation. However, the valve 16' is an advantagewhen it is desired to cut-off the steam from the blowers for purposes ofrepair and inspection.

What I claim is 1.-I n' a sootblo wer, the combination with a casinghaving a bearing and a cylinderin axial alinement'and said casing alsohaving a passage intersectin' rated from the cyli'n er, of a )ipereciprocative in the bearing and exten ing at one end into the cylinder,a nozzle on the other end the bearing and s'ep achamber 63 to the exofthe pipe pro ecting beyond'the casing,

ving at an intermediate part a pipe is moved to project the nozzle fromthe casing and said port being closed by the posite direction, a plstonfixed within the cylinder, means pressure-fluid to opposite ends of thecylinder to move the piston in opposite directions to reciprocate thepipe, ,means for supplying pressure-fluid to the passage, and a commonvalve mechanism controlling both means for supplying pressure-fluid tothe cylinderand to the passage respectively.

2. In a soot-blower, the combination with a cas1ng, of a pipereciprocative and oscillatlve in'the casing, a nozzle on an end of thepipe rejecting beyond the casing, means for supp ying pressure fluid tothe pipe to be ejected by the nozzle, 3. prime-mover for reciprocatingthe ipe, a second prime-mover or oscillating t e pipe to sweep back andforth the jet, emitted from the nozzle, and

for supplying pipe is moved in the op-. on the pipe .driven motor forreciprocating the .the casing to vary the projection of t e nozmeanscommon to both prime-movers for controlling the operation of the same.

3'. In a soot-blower, the combination with a casing, of a pipereciprocative and oscillative in the casing, a nozzle on an end of thepipeprojecting beyond the casing, means for supplying pressure fluid tothe pipe to be ejected by the nozzle, a prime-mover for reciprocatingthe pipe, a second prime-mover including a reciprocative element, andmechanism for translating reciprocative movement into oscillativemovement connecting'the reciprocative element with the pipe to impartoscillative movement to said pipe,

4. In a soot-blower, the combination with -a casing, of a. pipeoscillative and reciprocative in the casmg, a nozzle'on an end of thepipe projecting beyond the casing, means for supplying-pressure-fluid tothe pipe tobe ejected from the nozzle, means inc uding a prime-mover andpower-transmitting mechanism for oscillating the pipe, 9. poweripe inzle with relation to the casing, and a common control for theprime-mover and the motor.

5. In a soot-blower, the combination'with a casing having a bearing anda passage intersecting the bearing, means for supplying pressure-fluidto .the passage, a ipe reciprocative and oscillative in the earing andhaving a port to register with the passages,

'"a nozzle on an end of the pipe projecting beyond the casing, meansincluding a primemover and transmitting mechanisms tor 0scillating thepipe, a power-driven motor for reciprocating the pipe to vary theprojection of the nozzle with relation to the casing and also to movethe port into and out of register with the passage, and common controlfor the prime-mover and the motor.

6. In a soot-blower, the combination with a casing having a bearing anda cylinder in axial alignment, of a pipe reciprocativeand oscillative inthe hearing and extending into the cylinder, a nozzle on an end of thepipe projecting beyond the casing, means for supplying pressure-fluid tothe pipe to be e ected 50 by the nozzle, a piston on the pipe within thecylinder, means for supplyin pressure-fluid to opposite ends ofthe-cylin er to move the piston in opposite directions to reciprocatethe pipe to vary the projection of the nozzle with relation to thecasing, means for con trolling the pressure-fluid supply to thecylinder,a second-pressure-fluid motor operative to oscillate the pipe to sweep'the jet emitted by the nozzle, and common means for controlling thesupply of pressure-fluid to the cylinder and to the second pressurefluidmotor.

7. In a soot-blower, the combination with a casing having a bearing anda cylinder in axial alinement with the bearing and said casing havinga.- passage intersecting the bearing, of a pipe reciprocative androtative in the bearing and extending into the cy1- inder, said pipehaving a port to register with said passage, a nozzle on an end of thepipe projecting beyond the casing, a piston on the pipe within thecylinder, means for supplying pressure-fluid to opposite ends of thecylinder to move the piston in opposite directions to reciprocate thepipe to move the port into and out of register with the passage in thecasing, the reciprocation of the pipe also operating to vary theprojection of the nozzle with relation to the casing means for supplyingpressure-fluid to the passage .in the casing, a second pressure-fluidmotor for oscillating the pipe to sweep the jet emitted b the nozzle,means for supplying pressureuid to the second motor, and a common valvemechanism controlling the pressure-fluid supply to the passage in thecasing, to the cylinder and to the second motor.

8. In a soot-blower, the combination with a casing, of a pipereciprocative and rotative in the casing, a nozzle on anend of the pipeprojecting beyond the casing, means for supplying pressure-fluid to thepipe to be ejected by the nozzle, a power-driven motor for reciprocatingthe pipe to vary the projection of the nozzle with relation to thecasng, mechanism for oscillating the pipe to jection of the nozzle withrelationto the casing, mechanism for oscillating the pipe to sweep thejet emitted-from the nozzle, a

second pressure-fluid motor for actuating the mechanism for oscillatingthe pipe,

pressure-fluid supply pipes communicating with both motors, and a commoncontrol valve for the supply pipes of both motors.

In testimony whereof I afiix my signature.

THOMAS FRANCIS DWYER, JR.

